Automatic shut-off valve for flush-tanks.



' PATENTED OCT. 31, 1905.

W. A. ALEXANDER. AUTOMATIC SHUT OFF VALVE FOR FLUSH TANKS.

APPLICATION FILED OUT. 20. 1904.

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PATENTED. OCT. 31, 1905.

W. A. ALEXANDER. 7 AUTOMATIC SHUT OFF VALVE FOR FLUSH TANKS.

APPLIOATION FILED 00120, 1904.

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(OAQW WVILLIAM A. ALEXANDER, OF VVILKINSBURG, PENNSYLVANIA.

AUTOMATIC SHUT-OFF VALVE FOR FLUSH-TANKS- Specification of LettersPatent.

Patented Oct. 31, 1905.

Application filed October 20, 1904. Serial No. 229,262.

To ctZl 2077,0111, it may concern:

Be it known that I, WILLIAM A. ALEXANDER, a citizen of the UnitedStates, residing at Wilkinsburg,in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inAutomatic Shut- Ofl Valves for Flush-Tanks; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the figures of reference marked thereon, which form a part ofthis specification.

This invention relates to an improved automatic shut-off valve forflush-tanks; and it consists in the certain details of construction andcombination of parts,as will be fully described hereinafter.

In the accompanying drawings, Figure 1 is an outside elevation of myimproved automatic shut-off valve for flush-tanks, the same beingconstructed and arranged in accordance with my invention. Fig. 2 is asectional side elevation of the same in which the valve is shown open topermit the entrance of water into the tank. Fig. 3 is a similar viewshowing the valve seated or closed, being the position of the parts whenthe tank is full of water. Fig. 4 is an end sectional elevation of thesame. Fig. 5 is a plan view of the valve. Fig. 6 is a plan view of thecasing having the working parts removed. Fig. 7 isaplan view of the baseand its integral valve-seat.

To construct an automatic shut-off valve for flush-tanks used inconnection with waterclosets, 1 provide a base portion consisting of anannular flange 2. adapted to-rest upon the bottom 3 of the tank, adownwardly-extending shank 6, a portion 6 of which is threaded to afforda means of connecting a watersupply pipe thereto and to attach the saidbase by means of a threaded nut or washer in a manner well known in theart. This base portion is formed with an inner annular bore 4:, the top5 of which is contracted or reduced in diameter, terminating in avalve-seat- 7 Radially-extending lugs 8 are formed integral with thebase, in which threaded openings 10 are made for the reception of screws10, for the purpose of connecting thereto a cylindrical shell 1, open atthe top and formed at the base with box-shaped parts 9, which serve tobreak the force of water flowing from the open valve and also as a meansof connection with the lugs 8 of the base. This shell or cylinder isarranged in a vertical position and is formed with a slot 28, extendingfrom the top some distance down one side, and at either side in asuitable position outwardly-projecting lugs 11 are provided, in which atransverse shaft or pin 12 is fixed. Loosely arranged upon this pin 12is a yoke 16, carrying a short lever 14, journaled to a pin 15 at itsouter end,the said lever beingformed with a slot 13 to preventinterference with the pin 12 and is attached at its inner end by shortpins 23 and 24 to two links 21 and 25, the one, 25, extending downwardto connect with a valve 29 and the other, 21, upward to connect with alever 18, operated by a float, as will be hereinafter described. Each ofthese links 21 and 25 is double, joined at the center by integralportions 21 and 25. The valve above mentioned consists of a cylindricalbody 29, an upwardly-extending lug 27 for connection (by means of a pin26) with the link 25, and a recessed base 31, in which a gasket orwasher 30 is placed and held in position by a screw 32. The upper link21 is pivotally connected to a fixed pin 22, to which a lever 18 is alsoconnected, and the said lever by a rod 17 to the outer end of the yoke16. This lever 18 is formed with an enlarged outer end 19, in which arethreaded openings, the one arranged above the other, in which thefloatlever 20 is attached, the said lever being fitted at its outer endwith a hollow ball or float in a manner common in the art and whenarranged as shown in the drawings (in the upper threaded opening) willpermit more water to enter the tank than if arranged as shown in dottedlines at 20, as is obvious.

In operation the outlet-valve (not shown) of the tank when opened todrain the tank permits the float to descend, moving the outer end of theyoke 16 downward, carrying the short lever 1A with it and releasing thepressure upon the top of the valve 29. This pressure removed from thevalve 29 will permit the water-pressureto lift said valve, giving freeentrance to the water until the same has reached the level of the float.The water arising in the tank will gradually lift the throat, therebyelevating the lever 18 and its connected yoke 16. The said yoke actingon the short lever 14 tends to bring the two links 21 and 25 the one inline with the other, and as the upper link 21 is fixed to the pin 22 thevalve 29 must move downward to its seat 7, thereby shutting off thesupply of water to the tank.

By reason of the compound leverage exerted on the valve 29, as abovedescribed, the

self to the exact construction shown and described.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

A shut-off valve for flush-tanks, consisting of the base portionprovided with a means for connection with a water supply pipe and formedwith a valve-seat, the valve 29, operating within a casing, thefloat-lever 18, the short lever 14, the yoke 16 connected thereto, thefloat-lever 18 connected to said yoke, the double-link connections 21and 25 connecting the valve 29 and the float-lever with the intermediatelever 14, in a manner that will cause the two links to be brought theone in line with the other when the float moves upward, as and for thepurpose described.

In testimony whereofl afliX my signature in presence of two witnesses.

YVILLIAM A. ALEXANDER.

Witnesses:

FRED O. HENZI, H. J. LEVIS.

